DjVuLibre is an open source implementation of DjVu, including viewers,
decoders, simple encoders, and utilities.

DjVu is a web-centric format and software platform for distributing
documents and images. It features advanced technologies such as image layer
separation, progressive loading, arithmetic coding, and lossy compression
for bitonal images, allowing for high quality, readable images to be stored
in a minimum of space.
